Solve 8*f + 5*n - 25 = 13*f, 0 = -5*f + n - 21 for f.
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What is the c'th term of -1688, -1693, -1702, -1715?
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What is the u'th term of -1063, -2152, -3241?
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What is the i'th term of 107, 199, 289, 377?
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What is the p'th term of -528, -536, -558, -600, -668, -768, -906?
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What is the o'th term of 1790, 1789, 1788, 1787, 1786?
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What is the b'th term of -1508, -3019, -4530, -6041?